I am SO sorry to hear about this. I lost tanks twice to that sort of thing. The first was when my wife thought she unplugged one thing and instead unplugged my entire power strip to my 240 gallon reef. The second time was recently when all my SPS were in a holding system and one of the kids unplugged the pumps. It is enough to make you lose your noodle. I would reccomend lots of testing and frequent 30-50 percent water changes as the death will cause more death
If you need a place to house anything LMK. Good luck with the survivors.